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7a34944aa9
Original commit message from CVS: That was monoscope...
340 lines
9.6 KiB
C
340 lines
9.6 KiB
C
/* gstmonoscope.c: implementation of monoscope drawing element
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* Copyright (C) <2002> Richard Boulton <richard@tartarus.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <config.h>
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include "monoscope.h"
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#define GST_TYPE_MONOSCOPE (gst_monoscope_get_type())
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#define GST_MONOSCOPE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MONOSCOPE,GstMonoscope))
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#define GST_MONOSCOPE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MONOSCOPE,GstMonoscope))
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#define GST_IS_MONOSCOPE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MONOSCOPE))
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#define GST_IS_MONOSCOPE_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MONOSCOPE))
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typedef struct _GstMonoscope GstMonoscope;
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typedef struct _GstMonoscopeClass GstMonoscopeClass;
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struct _GstMonoscope {
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GstElement element;
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/* pads */
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GstPad *sinkpad,*srcpad;
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GstBufferPool *peerpool;
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/* the timestamp of the next frame */
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guint64 next_time;
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gint16 datain[512];
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/* video state */
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gfloat fps;
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gint width;
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gint height;
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gboolean first_buffer;
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/* visualisation state */
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struct monoscope_state * visstate;
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};
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struct _GstMonoscopeClass {
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GstElementClass parent_class;
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};
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GType gst_monoscope_get_type(void);
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/* elementfactory information */
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static GstElementDetails gst_monoscope_details = {
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"Monoscope",
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"Visualization",
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"Displays a highly stabilised waveform of audio input",
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"Richard Boulton <richard@tartarus.org>"
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};
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/* signals and args */
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enum {
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/* FILL ME */
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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/* FILL ME */
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};
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GST_PAD_TEMPLATE_FACTORY (src_template,
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"src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"monoscopesrc",
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"video/x-raw-rgb",
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"bpp", GST_PROPS_INT (32),
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"depth", GST_PROPS_INT (32),
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"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
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"red_mask", GST_PROPS_INT (R_MASK_32),
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"green_mask", GST_PROPS_INT (G_MASK_32),
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"blue_mask", GST_PROPS_INT (B_MASK_32),
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"width", GST_PROPS_INT_RANGE (16, 4096),
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"height", GST_PROPS_INT_RANGE (16, 4096),
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"framerate", GST_PROPS_FLOAT_RANGE (0, G_MAXFLOAT)
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)
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)
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GST_PAD_TEMPLATE_FACTORY (sink_template,
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"sink", /* the name of the pads */
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GST_PAD_SINK, /* type of the pad */
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GST_PAD_ALWAYS, /* ALWAYS/SOMETIMES */
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GST_CAPS_NEW (
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"monoscopesink", /* the name of the caps */
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"audio/x-raw-int", /* the mime type of the caps */
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/* Properties follow: */
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"endianness", GST_PROPS_INT (G_BYTE_ORDER),
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"signed", GST_PROPS_BOOLEAN (TRUE),
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"width", GST_PROPS_INT (16),
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"depth", GST_PROPS_INT (16),
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"rate", GST_PROPS_INT_RANGE (8000, 96000),
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"channels", GST_PROPS_INT (1)
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)
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)
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static void gst_monoscope_class_init (GstMonoscopeClass *klass);
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static void gst_monoscope_base_init (GstMonoscopeClass *klass);
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static void gst_monoscope_init (GstMonoscope *monoscope);
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static void gst_monoscope_chain (GstPad *pad, GstData *_data);
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static GstPadLinkReturn
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gst_monoscope_sinkconnect (GstPad *pad, GstCaps *caps);
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static GstPadLinkReturn
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gst_monoscope_srcconnect (GstPad *pad, GstCaps *caps);
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static GstElementClass *parent_class = NULL;
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GType
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gst_monoscope_get_type (void)
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{
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static GType type = 0;
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if (!type) {
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static const GTypeInfo info = {
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sizeof (GstMonoscopeClass),
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(GBaseInitFunc) gst_monoscope_base_init,
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NULL,
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(GClassInitFunc) gst_monoscope_class_init,
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NULL,
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NULL,
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sizeof (GstMonoscope),
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0,
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(GInstanceInitFunc) gst_monoscope_init,
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};
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type = g_type_register_static (GST_TYPE_ELEMENT, "GstMonoscope", &info, 0);
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}
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return type;
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}
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static void
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gst_monoscope_base_init (GstMonoscopeClass *klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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GST_PAD_TEMPLATE_GET (src_template));
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gst_element_class_add_pad_template (element_class,
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GST_PAD_TEMPLATE_GET (sink_template));
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gst_element_class_set_details (element_class, &gst_monoscope_details);
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}
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static void
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gst_monoscope_class_init(GstMonoscopeClass *klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass*) klass;
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gstelement_class = (GstElementClass*) klass;
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parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
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}
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static void
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gst_monoscope_init (GstMonoscope *monoscope)
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{
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/* create the sink and src pads */
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monoscope->sinkpad = gst_pad_new_from_template (
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GST_PAD_TEMPLATE_GET (sink_template ), "sink");
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monoscope->srcpad = gst_pad_new_from_template (
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GST_PAD_TEMPLATE_GET (src_template ), "src");
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gst_element_add_pad (GST_ELEMENT (monoscope), monoscope->sinkpad);
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gst_element_add_pad (GST_ELEMENT (monoscope), monoscope->srcpad);
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gst_pad_set_chain_function (monoscope->sinkpad, gst_monoscope_chain);
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gst_pad_set_link_function (monoscope->sinkpad, gst_monoscope_sinkconnect);
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gst_pad_set_link_function (monoscope->srcpad, gst_monoscope_srcconnect);
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monoscope->next_time = 0;
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monoscope->peerpool = NULL;
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/* reset the initial video state */
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monoscope->first_buffer = TRUE;
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monoscope->width = 256;
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monoscope->height = 128;
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monoscope->fps = 25.; /* desired frame rate */
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}
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static GstPadLinkReturn
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gst_monoscope_sinkconnect (GstPad *pad, GstCaps *caps)
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{
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GstMonoscope *monoscope;
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monoscope = GST_MONOSCOPE (gst_pad_get_parent (pad));
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if (!GST_CAPS_IS_FIXED (caps)) {
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return GST_PAD_LINK_DELAYED;
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}
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return GST_PAD_LINK_OK;
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}
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static GstPadLinkReturn
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gst_monoscope_negotiate (GstMonoscope *monoscope)
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{
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GstCaps *caps;
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caps = GST_CAPS_NEW (
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"monoscopesrc",
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"video/x-raw-rgb",
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"bpp", GST_PROPS_INT (32),
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"depth", GST_PROPS_INT (32),
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"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
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"red_mask", GST_PROPS_INT (R_MASK_32),
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"green_mask", GST_PROPS_INT (G_MASK_32),
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"blue_mask", GST_PROPS_INT (B_MASK_32),
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"width", GST_PROPS_INT (monoscope->width),
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"height", GST_PROPS_INT (monoscope->height),
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"framerate", GST_PROPS_FLOAT (monoscope->fps)
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);
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return gst_pad_try_set_caps (monoscope->srcpad, caps);
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}
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static GstPadLinkReturn
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gst_monoscope_srcconnect (GstPad *pad, GstCaps *caps)
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{
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GstPadLinkReturn ret;
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GstMonoscope *monoscope = GST_MONOSCOPE (gst_pad_get_parent (pad));
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if (gst_caps_has_property_typed (caps, "width", GST_PROPS_INT_TYPE)) {
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gst_caps_get_int (caps, "width", &monoscope->width);
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}
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if (gst_caps_has_property_typed (caps, "height", GST_PROPS_INT_TYPE)) {
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gst_caps_get_int (caps, "height", &monoscope->height);
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}
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if (gst_caps_has_property_typed (caps, "framerate", GST_PROPS_FLOAT_TYPE)) {
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gst_caps_get_float (caps, "framerate", &monoscope->fps);
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}
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if ((ret = gst_monoscope_negotiate (monoscope)) <= 0)
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return ret;
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return GST_PAD_LINK_DONE;
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}
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static void
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gst_monoscope_chain (GstPad *pad, GstData *_data)
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{
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GstBuffer *bufin = GST_BUFFER (_data);
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GstMonoscope *monoscope;
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GstBuffer *bufout;
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guint32 samples_in;
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gint16 *data;
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gint i;
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monoscope = GST_MONOSCOPE (gst_pad_get_parent (pad));
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GST_DEBUG ("Monoscope: chainfunc called");
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samples_in = GST_BUFFER_SIZE (bufin) / sizeof (gint16);
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GST_DEBUG ("input buffer has %d samples", samples_in);
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/* FIXME: should really select the first 1024 samples after the timestamp. */
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if (GST_BUFFER_TIMESTAMP (bufin) < monoscope->next_time || samples_in < 1024) {
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GST_DEBUG ("timestamp is %" G_GUINT64_FORMAT ": want >= %" G_GUINT64_FORMAT, GST_BUFFER_TIMESTAMP (bufin), monoscope->next_time);
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gst_buffer_unref (bufin);
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return;
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}
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data = (gint16 *) GST_BUFFER_DATA (bufin);
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/* FIXME: Select samples in a better way. */
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for (i=0; i < 512; i++) {
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monoscope->datain[i] = *data++;
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}
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if (monoscope->first_buffer) {
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monoscope->visstate = monoscope_init (monoscope->width, monoscope->height);
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g_assert(monoscope->visstate != 0);
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GST_DEBUG ("making new pad");
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if (!GST_PAD_CAPS (monoscope->srcpad)) {
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if (gst_monoscope_negotiate (monoscope) <= 0) {
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gst_element_error (GST_ELEMENT (monoscope), "could not set caps");
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return;
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}
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}
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monoscope->first_buffer = FALSE;
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}
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bufout = gst_buffer_new ();
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GST_BUFFER_SIZE (bufout) = monoscope->width * monoscope->height * 4;
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GST_BUFFER_DATA (bufout) = (guchar *) monoscope_update (monoscope->visstate, monoscope->datain);
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GST_BUFFER_TIMESTAMP (bufout) = monoscope->next_time;
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GST_BUFFER_FLAG_SET (bufout, GST_BUFFER_DONTFREE);
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monoscope->next_time += GST_SECOND / monoscope->fps;
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gst_pad_push (monoscope->srcpad, GST_DATA (bufout));
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gst_buffer_unref (bufin);
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GST_DEBUG ("Monoscope: exiting chainfunc");
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}
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static gboolean
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plugin_init (GstPlugin *plugin)
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{
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return gst_element_register(plugin, "monoscope",
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GST_RANK_NONE, GST_TYPE_MONOSCOPE);
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}
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GST_PLUGIN_DEFINE (
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GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"monoscope",
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"Monoscope visualization",
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plugin_init,
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VERSION,
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"LGPL",
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GST_COPYRIGHT,
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GST_PACKAGE,
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GST_ORIGIN
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)
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